The following packagings are authorized, provided that the general provisions of 4.1.1 and 4.1.3 are met:

Aluminium pressure receptacle made from tubing and having welded heads
Primary containment of the fuel within this receptacle shall consist of a welded aluminium bladder having a maximum internal volume of 46 L. The outer receptacle shall have a minimum design gauge pressure of 1275 kPa and a minimum burst gauge pressure of 2755 kPa. Each receptacle shall be leak-checked during manufacture and before shipment and shall be found leakproof. The complete inner unit shall be securely packed in non-combustible cushioning material, such as vermiculite, in a strong outer tightly closed metal packaging which will adequately protect all fittings. Maximum quantity of fuel per unit and package is 42 L.

Aluminium pressure receptacle
Primary containment of the fuel within this receptacle shall consist of a welded vapourtight fuel compartment with an elastomeric bladder having a maximum internal volume of 46 L. The pressure receptacle shall have a minimum design gauge pressure of 2680 kPa and a minimum burst pressure of 5170 kPa. Each receptacle shall be leak-checked during manufacture and before shipment and shall be securely packed in non-combustible cushioning material such as vermiculite, in a strong outer tightly closed metal packaging which will adequately protect all fittings. Maximum quantity of fuel per unit and package is 42 L.